the answer is 291,337 how do you work it out

Easy Farms Inc. makes tillers for small farms. Their sales budget is shown below: Sep sales, units 10,000 Oct sales, units 32,000 Nov sales, units 40,000 Management want enough tillers on hand to meet 10% of next month's sales. Each tiller requires 7 round blades. Management wants enough blades to meet 2\% of next month's production needs. Each blade cost $3.30. What is the material budget for blades for September (in dollars)? Enter as a whole number, no commas and no dollar signs